Treatment of Concentrated Liquid of Landfill leachate by Coagulation and Micro-electrolysis Strengthened by H_2O_2

摘要

According to water quality characteristics, coagulation and micro-electrolysis process was utilized to the treatment of concentrate liquid of membrane landfill leachate. Working parameters were optimized through single and orthogonal experiments. The experimental results showed that under the optimum conditions, remova1 rates of COD, TOC, UV254 and chromaticity reached 76.8%, 79.6%, 81.1% and 70%, respectively. The value of BOD5/COD increased from 0.03 to 0.31 and E2/E4 increased from 12.4 to 38.5. The biodegradability of wastewater was improved significantly, which was advantageous to the subsequent bio-treatment. It can be concluded that the process of coagulation and micro-electrolysis is an attractive alternative for the reuse and volume reduction of concentrated liquid of membrane landfill leachate.